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中性子照射したSUS304鋼のBWR模擬高温水環境におけるIASCC進展挙動評価

IASCC growth behavior evaluation of neutron-irradiated SUS304 stainless steel under BWR simulated high temperature water condition

加治 芳行  ; 三輪 幸夫; 柴田 晃 ; 加藤 佳明; 田口 剛俊 ; 中野 純一; 塚田 隆 ; 高倉 賢一*; 仲田 清智*

Kaji, Yoshiyuki; Miwa, Yukio; Shibata, Akira; Kato, Yoshiaki; Taguchi, Taketoshi; Nakano, Junichi; Tsukada, Takashi; Takakura, Kenichi*; Nakata, Kiyotomo*

材料試験炉(JMTR)において288$$^{circ}$$CのBWR模擬水環境下で0.62$$sim$$9.2dpaまで照射した304系ステンレス鋼のき裂進展速度試験を実施し、ミクロ組織,照射硬化及び照射誘起偏析とき裂進展速度の関係について検討した結果について報告する。

SCC growth tests have been carried out using type 304 stainless steel that had been pre-irradiated 0.62 to 9.2dpa under BWR simulated high temperature water condition at 288$$^{circ}$$C in the JMTR. This paper describes the investigated results of crack growth rate characteristics from the point of view of microstructure, radiation hardening and radiation induced segregation.

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